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Chapter:Surface Tension


Surface Tension is the tendency of fluid surfaces to shrink into the minimum surface area possible. Surface tension allows insects, usually denser than water, to float and slide on a water surface. Surface tension results from the greater attraction of liquid molecules to each other than to the molecules in the air.

Chapter Analysis:

Expect for the year of 2014 and 2013, no question has been asked from this chapter in the other years. The last 5 years have had a drought for the questions from this chapter. Hence, we should not be expecting any question from this chapter in the upcoming paper.
The below given graph will illustrate the above-mentioned analysis:

Year 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009
Questions 0 0 0 0 0 1 1 0 0 0 0

The important topics to be covered from this chapter are:
• Surface Energy and Surface Tension
• Angle of Contact
• Excess of Pressure across a Curved Surface
• Application of Surface Tension ideas to Drops, Bubbles and Capillary Rise

Tips and Tricks:

• The students must begin with reading the NCERT portion as it has a good basic explanation of the chapter and helps form the base for further reading. Here is the link to the NCERT PDF version of the mentioned chapter:
• Flash Cards are to be created by the students so that they are able to revise the parts and their functions easily.
• Mnemonics may be created uniquely by the student so that they are able to retain the parts in their mind easily.
• All the past year questions must be solved so that one understands the type of questions that are asked in the paper.
• Revision every week should be done to keep the chapter fresh.


Q. ?